Cheese Filled Hamburger Patties

Combine meat, sauces and onion. Divide mixture into 8 portions and shape evenly into thick, flat patties.

Prepare a fire in a grill to medium heat. Place a cheese slice on 4 of the patties. Drain pineapple, spoon onto patties and top with remaining patties. Carefully mold patty so that it encases cheese completely (no visible joins). Grill, turning occasionally, for 15-20 minutes, or until done to your liking. Assemble in usual way.